题解 | #合法括号序列判断#

import java.util.*;

public class Parenthesis {
    public boolean chkParenthesis(String A, int n) {
        // write code here
        if(n % 2 != 0) {
            return false;
        }
        Stack<Character> stack = new Stack<>();
        for(char ch : A.toCharArray()) {
            if(ch == '(') {
                stack.push(ch);
            } else if(ch == ')') {
                if(stack.isEmpty()) {
                    return false;
                } else if(stack.peek() == '(') {
                    stack.pop();
                }
            } else {
                return false;
            }
        }
        return stack.isEmpty();
    }
}